Jacobsen lawn tractors

Jacobsen Chief-O-Matic 800 53070

The Jacobsen Chief-O-Matic 800 is a 1966 garden tractor built in Racine, Wisconsin, USA by Jacobsen. It features an 8 hp Kohler K181 305cc 1-cylinder air-cooled gasoline engine with electric start and a belt-driven hydrostatic transmission providing infinite forward and reverse speeds. The tractor has two-wheel drive, manual steering, mechanical band brakes, and an open operator station. It includes a mid PTO with manual clutch. Dimensions include a 42 inch wheelbase, 61 inch length, and 33 inch width. Tires are lawn/turf type with front sizes 16x4.80-8 or 16x6.50-8 and rear sizes 22x6-12 or 22x8-12. Attachments available include 36" and 42" mid-mount mower decks, snowblowers, blade, and front-end loader. Electrical system is 12 volts with negative ground. The serial number plate is located on the left-front side above the front axle.
Power-
Founded-
ModelChief-O-Matic 800

Technical Specifications

Detailed specifications and technical data for Jacobsen Chief-O-Matic 800 53070

Tires
Lawn/turf rear22x6-12, 22x8-12
Lawn/turf front16x4.80-8, 16x6.50-8
Engine
Typegasoline
ModelKohler K181
Power8 hp (6.0 kW)
Coolingair-cooled horizontal-shaft
Starterelectric
Cylinders1-cylinder
Fuel tank1.25 gal (4.7 L)
Rated RPM3600
Air cleanerdry
Bore/Stroke2.9375x2.75 inches (75 x 70 mm)
Displacement305 cc (18.64 ci)
Oil capacity1.25 qts (1.2 L)
Starter volts12
Dimensions
Width33 inches (83 cm)
Length61 inches (154 cm)
Wheelbase42 inches (106 cm)
Rear tread31.5 inches (80 cm)
Front tread30 inches (76 cm)
Height (hood)34.5 inches (87 cm)
Ground clearance11.75 inches (frame) (29 cm)
Clearance (rear axle)6.25 inches (15 cm)
Clearance (front axle)8.75 inches (22 cm)
Height (steering wheel)39 inches (99 cm)
Electrical
Groundnegative
Battery volts12
Mechanical
DriveTwo-wheel drive
BrakesMechanical band brakes
SteeringManual steering
Operator stationOpen operator station
Production
TypeGarden tractor
Year1966
Built inRacine, Wisconsin, USA
ManufacturerJacobsen
References
BookChief Tractors published in 1966, by Jacobsen
Attachments
Blade42 inches width (106 cm), front-mount
Snowblower36 inches width (91 cm), single-stage, front-mount, manual-lift; 36 inches width (91 cm), two-stage, front-mount, manual-lift
Front-end loaderDanco JC 600 Loader, 300 lbs lift (full at pin) (136 kg), 52 inches clearance (level) (132 cm), Bucket width: 34 inches (86 cm)
36" mid-mount mower deck36 inches (91 cm), 2-blade, manual lift, left-discharge, Cut height: 1.5 to 4 inch (3 to 10 cm)
42" mid-mount mower deck42 inches (106 cm), 3-blade, manual lift, right-discharge, Cut height: 1.25 to 3 inch (3 to 7 cm)
Transmission
Typebelt-driven hydrostatic
Gearsinfinite forward and reverse
Power Take-off (PTO)
Typeindependent
Clutchmanual
LocationMid PTO
Serial Number Location
LocationSerial number plate on the left-front side of tractor, above the front axle.